:root {
  --bg-main: #070b1a;
  --bg-soft: #0d1328;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-strong: rgba(255, 255, 255, 0.1);
  --border: rgba(160, 189, 255, 0.24);
  --text-main: #eef4ff;
  --text-soft: #b2c0e6;
  --accent-a: #3a63ff;
  --accent-b: #00c2ff;
  --accent-c: #8256ff;
  --ok: #6fe4a8;
  --danger: #ff7d97;
  --shadow: 0 20px 60px rgba(3, 8, 24, 0.45);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1120px;
  --header-h: 76px;
  --body-bg: radial-gradient(circle at 80% 0%, rgba(58, 99, 255, 0.14), transparent 45%), radial-gradient(circle at 0% 60%, rgba(0, 194, 255, 0.1), transparent 45%), #070b1a;
  --site-overlay: linear-gradient(130deg, rgba(130, 86, 255, 0.12), transparent 30%), linear-gradient(330deg, rgba(0, 194, 255, 0.1), transparent 35%);
  --header-bg: rgba(7, 11, 26, 0.68);
  --header-border: rgba(188, 210, 255, 0.1);
  --surface-card: rgba(255, 255, 255, 0.06);
  --surface-card-strong: rgba(255, 255, 255, 0.1);
  --nav-link-active-bg: rgba(255, 255, 255, 0.08);
  --nav-menu-mobile-bg: rgba(8, 14, 32, 0.96);
  --btn-secondary-bg: rgba(255, 255, 255, 0.09);
  --btn-ghost-bg: rgba(255, 255, 255, 0.02);
  --btn-ghost-border: rgba(178, 196, 240, 0.25);
  --chip-bg: rgba(255, 255, 255, 0.04);
  --chip-border: rgba(176, 199, 255, 0.28);
  --chip-text: #dce8ff;
  --input-bg: rgba(2, 9, 24, 0.7);
  --input-border: rgba(178, 196, 240, 0.24);
  --project-tag-text: #d8ebff;
  --project-tag-bg: rgba(58, 99, 255, 0.25);
  --project-tag-border: rgba(118, 152, 255, 0.44);
  --contribution-strong: #f2f7ff;
}

html[data-theme="light"] {
  --bg-main: #f4f7ff;
  --bg-soft: #ecf1ff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --border: rgba(70, 105, 188, 0.22);
  --text-main: #111a32;
  --text-soft: #415078;
  --shadow: 0 16px 42px rgba(45, 80, 165, 0.14);
  --body-bg: radial-gradient(circle at 85% 0%, rgba(58, 99, 255, 0.2), transparent 40%), radial-gradient(circle at 0% 70%, rgba(0, 194, 255, 0.12), transparent 38%), #f4f7ff;
  --site-overlay: linear-gradient(145deg, rgba(58, 99, 255, 0.12), transparent 35%), linear-gradient(335deg, rgba(130, 86, 255, 0.1), transparent 40%);
  --header-bg: rgba(244, 247, 255, 0.78);
  --header-border: rgba(88, 124, 206, 0.2);
  --surface-card: rgba(255, 255, 255, 0.68);
  --surface-card-strong: rgba(255, 255, 255, 0.92);
  --nav-link-active-bg: rgba(58, 99, 255, 0.12);
  --nav-menu-mobile-bg: rgba(244, 247, 255, 0.98);
  --btn-secondary-bg: rgba(58, 99, 255, 0.08);
  --btn-ghost-bg: rgba(255, 255, 255, 0.45);
  --btn-ghost-border: rgba(70, 105, 188, 0.24);
  --chip-bg: rgba(58, 99, 255, 0.08);
  --chip-border: rgba(88, 124, 206, 0.26);
  --chip-text: #243664;
  --input-bg: rgba(255, 255, 255, 0.9);
  --input-border: rgba(94, 129, 207, 0.28);
  --project-tag-text: #1d3b83;
  --project-tag-bg: rgba(58, 99, 255, 0.16);
  --project-tag-border: rgba(58, 99, 255, 0.32);
  --contribution-strong: #10285c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background: var(--body-bg);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.28s ease, color 0.28s ease;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin-inline: auto;
}

.site-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background: var(--site-overlay);
  filter: blur(2px);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: blur(14px);
  background: var(--header-bg);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.25px;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(130deg, var(--accent-b), var(--accent-c));
  box-shadow: 0 0 14px rgba(0, 194, 255, 0.85);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  list-style: none;
  margin: 0;
  padding: 0;
  margin-left: auto;
}

.nav-link {
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  color: var(--text-soft);
  font-weight: 600;
  font-size: 0.94rem;
  transition: color 0.25s ease, background-color 0.25s ease;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
  color: var(--text-main);
  background: var(--nav-link-active-bg);
}

.nav-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.theme-toggle,
.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--btn-ghost-bg);
  color: var(--text-main);
  cursor: pointer;
  padding: 0;
}

.theme-toggle {
  width: auto;
  min-width: 44px;
  padding: 0.52rem 0.74rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.84rem;
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.nav-toggle:hover,
.nav-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent-b);
}

.theme-icon {
  font-size: 0.92rem;
}

.nav-toggle {
  display: none;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--text-main);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.section {
  padding: 6.5rem 0;
}

.hero {
  padding-top: calc(var(--header-h) + 4rem);
  padding-bottom: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 2.5rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-b);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
}

.hero-subtitle {
  margin: 0.75rem 0;
  font-size: clamp(1.02rem, 1.9vw, 1.35rem);
  color: var(--text-soft);
  font-weight: 600;
}

.typing-wrap {
  margin: 0.25rem 0 1rem;
  min-height: 2rem;
  font-weight: 600;
}

.typing-prefix {
  color: var(--text-soft);
}

#typingText {
  color: var(--accent-b);
}

.typing-caret {
  display: inline-block;
  width: 2px;
  height: 1rem;
  vertical-align: -2px;
  background: var(--accent-b);
  margin-left: 0.15rem;
  animation: blink 0.95s infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero-intro,
.section-intro {
  color: var(--text-soft);
  max-width: 68ch;
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.72rem 1.05rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 0.94rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent-a), var(--accent-b));
  color: #f8fbff;
  box-shadow: 0 12px 28px rgba(18, 56, 179, 0.32);
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  border-color: var(--border);
}

.btn-ghost {
  background: var(--btn-ghost-bg);
  border-color: var(--btn-ghost-border);
  color: var(--text-soft);
}

.hero-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 0.9rem;
  background: linear-gradient(155deg, var(--surface-card-strong), var(--surface-card));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-image-card::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto;
  height: 220px;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.24), transparent 65%);
  pointer-events: none;
}

html[data-theme="light"] .hero-image-card::before {
  background: radial-gradient(circle, rgba(58, 99, 255, 0.2), transparent 65%);
}

.hero-image-card img,
.img-fallback {
  border-radius: calc(var(--radius-lg) - 8px);
  min-height: 380px;
  object-fit: cover;
}

.img-fallback {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.65rem;
  background: linear-gradient(145deg, rgba(58, 99, 255, 0.2), rgba(130, 86, 255, 0.18));
  color: var(--text-soft);
}

.hero-image-card.fallback .img-fallback {
  display: flex;
}

.hero-image-card.fallback img {
  display: none;
}

.img-fallback i {
  font-size: 2rem;
}

.section-title {
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  margin-bottom: 1rem;
}

.section-title::after {
  content: "";
  display: block;
  width: 80px;
  height: 3px;
  margin-top: 0.6rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b), var(--accent-c));
}

.facts-grid,
.skills-grid,
.projects-grid,
.contact-grid,
.two-col {
  display: grid;
  gap: 1rem;
}

.facts-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.skills-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.2rem;
}

.projects-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.2rem;
}

.contact-grid,
.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.2rem;
}

.glass-card,
.project-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(9px);
  box-shadow: var(--shadow);
  padding: 1.15rem;
}

.glass-card h3,
.project-card h3 {
  margin-bottom: 0.7rem;
  font-size: 1.05rem;
}

.glass-card p,
.project-card p {
  margin: 0;
  color: var(--text-soft);
}

.project-card {
  position: relative;
  overflow: hidden;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(140deg, rgba(58, 99, 255, 0.2), rgba(0, 194, 255, 0), rgba(130, 86, 255, 0.18));
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(183, 213, 255, 0.45);
}

.project-card:hover::before,
.project-card:focus-within::before {
  opacity: 1;
}

html[data-theme="light"] .project-card:hover,
html[data-theme="light"] .project-card:focus-within {
  border-color: rgba(58, 99, 255, 0.35);
}

.project-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.project-tag {
  border-radius: 999px;
  padding: 0.26rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--project-tag-text);
  background: var(--project-tag-bg);
  border: 1px solid var(--project-tag-border);
  white-space: nowrap;
}

.chip-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.9rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--chip-border);
  background: var(--chip-bg);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.8rem;
  color: var(--chip-text);
}

.tech-chips {
  margin-bottom: 0.95rem;
}

.contribution {
  margin-top: 0.3rem;
}

.contribution strong {
  color: var(--contribution-strong);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

a[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.6;
}

.contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.95rem;
}

.contact-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.contact-list i {
  color: var(--accent-b);
}

.copy-btn {
  cursor: pointer;
}

form {
  display: grid;
  gap: 0.55rem;
}

label {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-soft);
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  background: var(--input-bg);
  color: var(--text-main);
  padding: 0.7rem 0.75rem;
  font: inherit;
}

input:focus-visible,
textarea:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible,
.theme-toggle:focus-visible,
.nav-link:focus-visible {
  outline: 2px solid var(--accent-b);
  outline-offset: 2px;
}

.footer {
  border-top: 1px solid var(--header-border);
  padding: 1.4rem 0;
  color: var(--text-soft);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-content p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 0.85rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--text-main);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.08s;
}

.delay-2 {
  transition-delay: 0.16s;
}

.delay-3 {
  transition-delay: 0.24s;
}

@media (max-width: 1024px) {
  .hero-grid,
  .projects-grid,
  .facts-grid,
  .skills-grid,
  .contact-grid,
  .two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-image-card img,
  .img-fallback {
    min-height: 320px;
  }
}

@media (max-width: 760px) {
  :root {
    --header-h: 72px;
  }

  .section {
    padding: 5.2rem 0;
  }

  .hero {
    padding-top: calc(var(--header-h) + 2.2rem);
  }

  .theme-text {
    display: none;
  }

  .theme-toggle {
    width: 44px;
    padding: 0;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 1rem;
    right: 1rem;
    display: grid;
    gap: 0.4rem;
    padding: 0.7rem;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--nav-menu-mobile-bg);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.24s ease, transform 0.24s ease, visibility 0.24s ease;
    margin-left: 0;
  }

  .nav-open .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .hero-grid,
  .facts-grid,
  .skills-grid,
  .projects-grid,
  .contact-grid,
  .two-col {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    gap: 0.55rem;
  }

  .btn {
    width: 100%;
  }

  .project-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-list li {
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}